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BITSAT 2013 Paper

Section: Mathematics
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Question : 118 of 150
 
Marks: +1, -0
If
→
a
,
→
b
,
→
c
 are three unit vectors such that
→
a
+
→
b
+
→
c
 =
→
0
 , where
→
0
 is null vector, then
→
a
.
→
b
+
→
b
.
→
c
+
→
c
.
→
a
 is :
Validate
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